Dead plants

An anonymous Redditor said that one person returned a three-year-old tree that had died. WolfHunter209 agreed saying, "It's stupid how common this is."

ManicHispanic85 chimed in and said, "Usually a few months after the Garden Center closes, people bring back plants that died. Sorry, let me rephrase that... plants they couldn't take care of properly."

13-year-old fish

This might be the most shady return of them all. According to Xianricca, one Costco customer requested to return 13-year-old fish. The Redditor explained that the customer left the fish in the freezer and forgot about it. "If I remember correctly they let her return it," Xianricca said. Let's just hope it didn't go back on the freezer aisle...

Empty liquor bottles

Elaine Thompson/AP Images

jb2255 was awed when "a lady returned an empty bottle of wine cause it gave her a headache." Maybe a hangover isn't as bad if it's free.

Sonic343 was also shocked after witnessing a customer return open bottles of alcohol and still get a refund.

A half-eaten steak

One of the most shocking returns inglorious---- witnessed was a container of rib-eye bones and fat. "Yes, they were completely reimbursed for returning literally .13 cents worth of fat and bones," inglorious---- said.

Old mattresses

dildope claimed to have seen customers return old "peed on" mattresses. User blacksteyraug agreed: "When I was on maintenance, we had to cut [the old mattresses] up and put them down the trash compactor. Always disgusting."

A suspicious safe

iheartrms said the craziest thing a customer returned was a huge safe that was "reeking of marijuana." According to the Redditor, the police was called immediately.